解题思路:
注意事项:
参考代码:
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int N = scanner.nextInt(); float sum = 0; for(byte i = 0;i < N;i++) { sum += (f(i + 2) / f(i + 1)); } System.out.print(String.format("%.2f", sum)); } public static float f(int i) { //┏┛墓┗┓...(((m -__-)m if (i < 3) { return i; } return f(i - 1) + f(i - 2); } }
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